Nothing surprising here.
Leg Spinners love bounce & carry on wickets, because their weapon is variation - flight, drift & sliders. Now, PAK domestic is played on pathetic wickets - wickets that actually doesn't help quality bowlers - bowlers with skill, pace, spin or variation. It's a wicket for Zulfi Babar, Kashif like darters or Sadaf, Asad like metronomes. You can check, I am not sure, but I think Asif, Ajmal's FC average is also lower (better) than their International career. These 3 blowers are extremely skillful bowlers, whose tricks are nullified by the dullness of the wickets - in simple words, these bowlers have beaten domestic batsmen all ends up, but for the dead tracks, either edges haven't carried to slips or short catchers (or fielders have dropped it) or batsmen had the time to block the ball after beaten by flight or turn or seem variation.
The same logic you can apply for batsmen - best batsmen in PAK domestics are Fawad, Azhar, Farhat, Latif, Manzoor, Shehzad, Misbah, Hasan Raza ..... players with very little flair, hardly any back-lift, limited shots, hardly any back-foot game but lots of patience & a good forward defence for dead slow & low wickets. One common trait of all these batsmen are that, they can't rotate strike - to rotate strike, 1st thing you need is 360 array of shots on either feet, then the placement (which is basically guiding the ball in gaps by using the top hand) - these two quality can only be developed if the batsmen play of faster wickets with a bit of consistent bounce, where ball comes on to bat. Classic example is Ahmed - he times the ball so well that, it actually limits his single taking options - ball reaches to fielder like a tress of bullet, but absolutely arrow straight. Among contemporary openers, Ahmed misses to connect the ball one of the least, but his SR is 70 & shot productivity is less than 35% (a scoring shot in 3 balls or more). A bit of better placement, this guy would have 40+/80+ ODI stats.